Re: RFA: fix PR 9164

[Tom Tromey <tromey at redhat dot com>]

>>>>> "Daniel" == Daniel Jacobowitz <drow@false.org> writes:

Tom> This fix defers the choice of type to the language, using the existing
Tom> language-arch machinery.  I fixed the C language family, including
Tom> ObjC, but I left the other languages unchanged.  I think the language
Tom> maintainers will have to make a change here, if one is needed or
Tom> desired.  (FWIW I don't think Java needs a change, since I don't think
Tom> it is possible to invoke sizeof when Java is the selected language.)

Daniel> Before adding all this, do you know of any language where the signed
Daniel> behavior is correct?

Nope.  I don't know that a signed type is incorrect, either.  I really
know nothing about the other languages here, so I chose to preserve
the current behavior.

Even if all languages want an unsigned type, I still think something
like this patch is the way to go, because for C languages you
generally want the inferior's "size_t".

That is, this is the way to go assuming that we continue to have
language-dependent expressions.  If it weren't for UNOP_SIZEOF, I
probably would have made this a C-specific patch.  Another idea would
be to add an evaluate_subexp_c, and have it handle UNOP_SIZEOF.

Tom